JP2016524387A - ハーフサイクル化直交周波数分割多重送信及び受信 - Google Patents
ハーフサイクル化直交周波数分割多重送信及び受信 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
- H04L27/263—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators modification of IFFT/IDFT modulator for performance improvement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5563—Digital frequency modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0298—Wavelength-division multiplex systems with sub-carrier multiplexing [SCM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03821—Inter-carrier interference cancellation [ICI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2643—Modulators using symbol repetition, e.g. time domain realization of distributed FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
- H04L27/2651—Modification of fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators for performance improvement
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Abstract
Description
本出願は、2013年5月16日に出願された米国仮出願第61/824,324号の優先権を主張する。この特許文献の全ての内容は、引用によって本願に援用される。
Claims (20)
- 光直交周波数分割多重信号(OFDM)信号を送信する方法において、
データをOFDMシンボルに変調するステップと、
OFDMシンボルのシンボル期間をTとして、T/2の期間の間、OFDMシンボルのハーフサイクルのみで前記データを送信するステップであって、前記OFDMシンボルが、1つおきの副搬送波がデータによって変調されないことによって抑圧された複数の副搬送波から構成される、ステップと
を含む方法。 - 前記ハーフサイクルは、前記シンボル期間の前半である、請求項1記載の方法。
- 前記シンボル期間の後半に別のOFDMシンボルのハーフサイクルを送信するステップを更に含む請求項2記載の方法。
- 前記前半は、前記後半に対して時間的に先行する、請求項3記載の方法。
- 前記抑圧される副搬送波は、前記OFDMシンボルの偶数副搬送波である、請求項1記載の方法。
- 前記抑圧される副搬送波は、前記OFDMシンボルの奇数副搬送波である、請求項1記載の方法。
- 送信の前に、前記OFDM信号をローパスフィルタによってフィルタリングするステップを更に含む請求項1記載の方法。
- 直交周波数分割多重(OFDM)送信装置において、
OFDMシンボルを生成するシンボル生成モジュールを備え、
前記OFDMシンボルの周波数領域表現は、データが変調される副搬送波の第1のセットと、データが変調されない副搬送波の第2のセットとから構成され、前記第1のセットの副搬送波と、前記第2のセットの副搬送波とは、周波数領域で交互になり、
前記OFDMシンボルの時間領域表現は、第1の時間間隔の前半サイクルと、前記前半サイクルに続く、前記第1の時間間隔と同じ期間の第2の時間間隔の後半サイクルとから構成され、
前記OFDMシンボルの前記前半サイクルを送信する送信モジュールを更に備える装置。 - 前記副搬送波の第1のセットは、前記OFDMシンボルの奇数副搬送波から構成される、請求項8記載の装置。
- 前記副搬送波の第1のセットは、前記OFDMシンボルの偶数副搬送波から構成される、請求項8記載の装置。
- 光直交周波数分割多重(OFDM)信号を受信する方法において、
OFDMシンボルのシンボル期間をTとして、T/2の期間の間、OFDMシンボルのハーフサイクルを受信するステップであって、前記OFDMシンボルが、1つおきの副搬送波がデータによって変調されないことによって抑圧された複数の副搬送波から構成される、ステップと、
前記OFDMシンボルの受信したハーフサイクルからデータを復元するステップと
を含む方法。 - 前記ハーフサイクルは、前記シンボル期間の前半である、請求項11記載の方法。
- 前記シンボル期間の後半に別のOFDMシンボルのハーフサイクルを受信するステップを更に含む請求項12記載の方法。
- 前記前半は、前記後半に対して時間的に先行する、請求項13記載の方法。
- 前記抑圧される副搬送波は、前記OFDMシンボルの偶数副搬送波である、請求項11記載の方法。
- 前記抑圧される副搬送波は、前記OFDMシンボルの奇数副搬送波である、請求項11記載の方法。
- 直交周波数分割多重(OFDM)受信装置において、
OFDM送信のシンボル期間をTとして、T/2の期間を有する第1の時間間隔においてOFDM送信を受信する光モジュールと、
信号を生成する完全サイクル生成モジュールと、
高速フーリエ変換モジュールと、
OFDMシンボルを生成するシンボル生成モジュールとを備え、
前記OFDMシンボルの周波数領域表現は、データが変調される副搬送波の第1のセットと、データが変調されない副搬送波の第2のセットとから構成され、前記第1のセットの副搬送波と、前記第2のセットの副搬送波とは、周波数領域で交互になり、
前記OFDMシンボルの時間領域表現は、第1の時間間隔の前半サイクルと、前記前半サイクルに続く、前記第1の時間間隔と同じ期間の第2の時間間隔の後半サイクルとから構成され、
前記OFDMシンボルの前記前半サイクルを送信する送信モジュールを更に備える装置。 - 前記副搬送波の第1のセットは、前記OFDMシンボルの奇数副搬送波から構成される。請求項17記載の装置。
- 前記副搬送波の第1のセットは、前記OFDMシンボルの偶数副搬送波から構成される。請求項17記載の装置。
- 変調された直交周波数分割多重(OFDM)シンボルの半分バージョンを送信する送信機と、
前記半分バージョンを受信し、前記OFDMシンボルの完全バージョンを再生し、前記OFDMシンボルに変調されているデータを復元する受信機と
を備える光通信システム。
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US201361824324P | 2013-05-16 | 2013-05-16 | |
US61/824,324 | 2013-05-16 | ||
PCT/US2014/038254 WO2014186610A1 (en) | 2013-05-16 | 2014-05-15 | Half-cycled orthogonal frequency divisional multiplexing transmission and reception |
Publications (2)
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JP2016524387A true JP2016524387A (ja) | 2016-08-12 |
JP6366692B2 JP6366692B2 (ja) | 2018-08-01 |
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US (1) | US10003423B2 (ja) |
JP (1) | JP6366692B2 (ja) |
CN (1) | CN105247806B (ja) |
WO (1) | WO2014186610A1 (ja) |
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WO2015074719A1 (en) * | 2013-11-25 | 2015-05-28 | Nokia Solutions And Networks Oy | Apparatus and method for communication with time-shifted subbands |
WO2015134437A1 (en) * | 2014-03-07 | 2015-09-11 | Trustees Of Boston University | System and method for embedding phase and amplitude into a real-valued unipolar signal |
EP3391563A4 (en) * | 2015-12-16 | 2019-04-24 | Telefonaktiebolaget LM Ericsson (publ) | SENDING COMMUNICATION DEVICE, RECEIVING COMMUNICATION DEVICE AND METHOD THEREFORE WITH ILLUSTRATION OF THE CONSTELLATION SYMBOLS |
US11047963B1 (en) | 2020-08-21 | 2021-06-29 | Aeva, Inc. | Selective sub-band processing for angular resolution and detection sensitivity in a LIDAR system |
US11327158B1 (en) * | 2020-10-19 | 2022-05-10 | Aeva, Inc. | Techniques to compensate for mirror Doppler spreading in coherent LiDAR systems using matched filtering |
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- 2014-05-15 WO PCT/US2014/038254 patent/WO2014186610A1/en active Application Filing
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CN105247806A (zh) | 2016-01-13 |
JP6366692B2 (ja) | 2018-08-01 |
US20160087740A1 (en) | 2016-03-24 |
CN105247806B (zh) | 2018-10-09 |
WO2014186610A1 (en) | 2014-11-20 |
US10003423B2 (en) | 2018-06-19 |
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